Bug 2509536 (CVE-2026-12996)

Summary: CVE-2026-12996 OpenVPN: OpenVPN: Denial of Service or memory leak via crafted packets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenVPN. This use-after-free vulnerability allows remote authenticated peers to send specially crafted packets during TLS (Transport Layer Security) session promotion or expiry. Successful exploitation of this flaw could lead to a denial of service, making the service unavailable, or result in a memory leak, potentially exposing sensitive information.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2509664, 2509665    
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Description OSIDB Bzimport 2026-07-30 17:03:03 UTC
A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry